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The Shrinking Fermi Liquid Scenario for Strange-Metal Behavior from Overdamped Optical Phonons

  • We discuss how the interaction of electrons with an overdamped optical phonon can give rise to a strange-metal behavior over extended temperature and frequency ranges. Although the mode has a finite frequency, an increasing damping shifts spectral weight to progressively lower energies so that despite the ultimate Fermi liquid character of the system at the lowest temperatures and frequencies, the transport and optical properties of the electron system mimic a marginal Fermi liquid behavior. Within this shrinking Fermi liquid scenario, we extensively investigate the electron self-energy in all frequency and temperature ranges, emphasizing similarities and differences with respect to the marginal Fermi liquid scenario.

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Author: Giovanni Mirarchi, Marco GrilliORCiD, Götz SeiboldORCiD, Sergio CapraraORCiD
URL:https://www.mdpi.com/2410-3896/9/1/14
DOI:https://doi.org/10.3390/condmat9010014
ISSN:2410-3896
Title of the source (English):Condensed Matter
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2024
Tag:high-temperature cuprate superconductors; marginal Fermi liquid; strange-metal behavior
Volume/Year:9
Issue number:1
First Page:1
Last Page:13
Article number:14
Way of publication:Open Access
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Computational Physics
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